Materials Literature
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A vertically coupled quantum dots system in a double-layer electrons under a magnetic field is studied by means of the exact diagonalization of the Hamiltonian matrix.It is found that discontinuous ground-state energy transitions are induced by an external magnetic field in the case of strong coupling.However,in the c…
The composition design and production process for developing 380CL vehicle wheel steel in Liugang were introduced.
Resorcinol formaldehyde resin was a kind of adhesive agent used in rubber industry to enhance the adhesion between rubber and steel or fabric cord.Resorcinol formaldehyde resin can take the place of resorcinol monomer very well.Two domestic products and a famous foreign sample were collected and tested in our laborato…
In the paper are introduced the basic physical properties of milk protein fiber,the processing parameters and technological measures adopted in spinning milk protein fiber and Modal blended dyed knitting yarn.The made product characteristic of slim and soft,air permeability and moisture wicking is an ideal material fo…
Effect of heat treatment especially austenitizing temperature on impact energy of 60Si2CrV steel and fatigue life of leaf spring made of 60Si2CrV steel was studied and their fracture mechanisms were investigated by SEM.The results show that the austenitizing temperature has significant effect on impact energy and spri…
Two preservatives(MA and MB)consisting of carbendazim and prochloraz as active ingredients were mixed with urea formaldehyde resin(UF)respectively to improve the mold-resistant performance of the UF-bonded poplar oriented strandboard(OSB).Their effects on UF performance and on board properties were evaluated.The resul…
AISI 304 austenitic stainless steel was carburized at low temperature by means of active screen plasma carburizing technology(ASPC).A layer of carbon supersaturated solid solution(i.e.the Sc phase)can be formed on the steel surface without separation of chromium carbide.The surface hardness of the stainless steel trea…
The mating surface microstructure and hardness of helical bevel gear made of Mn-Cu alloyed austempered ductile iron (ADI) have been investigated using scanning electron microscope (SEM) and micro-hardness measurement,resulting in that mating surface hardness,wear-resisting property and service life of helical bevel ge…
Effect of boron on the formability and wear resistance of carbon arc hardfacing layer were studied by adding ferroboron into the Fe-based alloy.The results show that the formability of the hardfacing layer could be improved effectively by adding ferroboron into the alloy.The hardfacing layer with 4.01wt%-4.95wt% B cou…
In this paper,we have coated Pb0.93 La0.07 Zr0.40 Ti0.60 O3 flms on silicon substrate to create capacitor model that exhibit excellent dielectric properties.With PLZT coated directly on silicon substrate,we observed dielectric constant was 1 360,dielectric loss(tan δ) was 0.08 when measured at room temperature、100 MHz…
With the rapid development of machine tool industry in recent years,the production of super-heavy and high-precision vertical machine becomes the main product in my company.As the main parts,the rail and the top surface of the bench is required to have hot shrinkage and density defects.By applying high temperature mel…
The failure of machine taps arises frequently from excessive or premature wear.The causes for premature wear of machine taps are as follows: overheating during the sharpening,surface decarburizing,massive carbides or carbide aggregation in tap,lower hardness,excessively large rake angle and improper selection of cutti…
Objective:Constitute PDA vesicles' technology and used in food safety rapid detection.Method:Under UV irradiation,diacetylene molecules could polymerized and form vesicles.When felt the external stimulus,PDA conjugated electronic movement state changed,and system color transfered from blue to red,in the meantime fluor…
A chrome and fluorine-free pretreatment process of magnesium alloy for electroless nickel plating was selected optimally by orthogonal test method.The pretreatment bath mainly consists of (Mn(H_2PO_4)_2·H_2O,) H_3PO_4 and HNO_3,with 3 min dipping at 25 ℃.The corrosion resistance of magnesium alloy substrate and the ad…
Reaction injection molding technology is one of the important component of reactive polymer processing.This paper introduced the principles,characteristics,materials,equipment and basic theory progress of RIM.On this basis,the variable fiber injection-reaction injection molding(VFI-RIM) was introduced in details,at th…
A Nd(Ⅲ) coordination polymer {[Nd2(C2O4)3(H2O)6]·3CH3OH}n(1) was synthesized with pyrazinetetracarboxylic acid by hydrothermal method.The pink block crystals were obtained and elemental analysis was tested.It crystallized in monoclinic crystal system and P21/c space group and the crystallographic data for complex 1 is…
FePt thin films were prepared by magnetron sputtering on Si0001 substrates and annealed at 650 ℃ for 1 h.The structure and magnetic properties of the films were investigated through the X-ray diffraction and the vibrating sample magnetometer.The results indicated that ordered face-centered tetragonal L10-FePt phase ha…
Silicon(Si)/graphite/pyrolytic carbon composite was synthesized by chemical vapor deposition(CVD)method.The effects of synthesizing process on the electrochemical performance of the composite were analyzed by XRD,SEM and galvanostatic charge-discharge tests.The prepared composite had fine cycle performance when the va…
The failure behavior of Au interconnects,2 μm wide and 200 nm thick,at high-density alternating current was investigated.Analyzing the temperature field model of the failure melting process of Au interconnects under the action of alternating current,an analytic solution to the temperature field at high current density…
First prepared the nano-silica emulsion using sodium silicate as raw material,and using ammonium chloride to control the particle size.Then mixed the emulsion with the natural latex to produce nano-silica/NR composites.Analyzed the composites by SEM,observed the particle size and shape,finally tested the mechanical pr…